The modern stereo system

As for power, if it is not "clean" what is the point. Don't go by "peak power" but look for the RMS power or check power at at less than 1%THD. Some receivers can be rated at the same peak power but be vastly different when it comes to RMS power. Also the music decoding is different for different brands, so it is best to listen to different brands to see what you like best. Now if you cheap out on speakers, all this will be for naught. Speakers should match in power, watts RMS, and resistance, ohms.